I think without the flashlight to guide them they'd have likely died on the moor by slipping on some frosty ground, tripping on a rabbit hole or, as Bond does, wandering onto ice by accident. Being able to see where they're putting their feet trumped the risk of being seen by any survivors. Especially as a fall in your 70's can be pretty nasty.

Now, not keeping any sort of watch for stragglers when they got to safety, that was daft.